APA (7th ed.) Citation

Heikkinen, E., Kuusinen, J., & Ruoppila, I. (1995). Preparation for Aging. Springer US.

Chicago Style (17th ed.) Citation

Heikkinen, Eino, Jorma Kuusinen, and Isto Ruoppila. Preparation for Aging. Boston, MA: Springer US, 1995.

MLA (9th ed.) Citation

Heikkinen, Eino, et al. Preparation for Aging. Springer US, 1995.